第17章 旋转磁场的构想(5)
- 特斯拉自传
- (美)尼古拉·特斯拉
- 4990字
- 2015-09-28 16:34:48
Istarted by first picturing in my mind a direct-current machine,running it and following the changin...
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Istarted by first picturing in my mind a direct-current machine,running it and following the changin...